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What Do Tyre Numbers Mean: The odd letters and numbers that are printed on the side of tyres are familiar to all car owners, but few people truly understand what they mean. If you've ever paid close attention, you've probably seen markings like 210/65 R20 91V or something. Although they may appear confusing at first, these codes contain crucial information about the size, strength, speed capability and other characteristics of your tyre. In reality, these figures serve as a safety guide to help you in selecting the appropriate tyre for your vehicle, whether it be a truck, bike or car.

By being aware of these tyre numbers, you can increase your mileage, prevent collisions and even reduce maintenance costs. Because choosing the incorrect size or rating can lower performance and increase risks, auto experts always advise verifying these details before purchasing new tires. It is crucial to comprehend these markings if you drive or own a car.

Let's simplify this so you can understand the meaning of those numbers the next time you check your tyre.

What Do Tyre Numbers Represent?

There are various components to each tyre number, and each component has a purpose. Let's take it one step at a time. Let's use the 210/65 R20 91V example to better understand.

what those tyre numbers mean (1)What do those tyre numbers mean (Image: Gemini AI)

1. Tyre Width (e.g., 210)

The first three digits tell you the width of the tyre in millimetres. For example, if the tyre shows 210, it means the tyre is 210 mm wide.

2. Aspect Ratio (e.g., 65)

The next number indicates the height of the tyre sidewall compared to its width. For example, 65 means the height is 65% of the tyre’s width. A lower number gives sportier handling, while a higher number provides more comfort.

 

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3. Construction Type (e.g., R)

The letter tells you how the tyre is built. R stands for Radial, the most common type today. Radial tyres offer durability, comfort, and better performance.

4. Rim Diameter (e.g., 20)

This number shows the size of the wheel rim in inches. For example, 20 means the tyre fits a 16-inch wheel. You should always match the rim size with your tyre to ensure safety.

5. Load Index (e.g., 91)

This number tells how much weight each tyre can carry. Example: 91 can carry up to 615 kg per tyre. Always choose tyres with the correct load index for your vehicle.

6. Speed Rating (e.g., V)

The last letter shows the maximum speed the tyre can handle safely. Example: V means up to 240 km/h. Other ratings include H (210 km/h), T (190 km/h), etc.

 

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Now, you understand that tyre numbers are a complete safety code and are not random. They provide you with information about your tyres' width, height, rim size, weight capacity and speed limit. Pay close attention to these figures the next time you purchase or inspect tires. It will guarantee your safety while driving, in addition to keeping your car in good operating order.